Automated Test Frameworks (ECU-TEST, TPT)

# TPT (PikeTec) test case structure - simplified Python equivalent
# In TPT: test cases are defined in the GUI as signal sequences
# with assesslets for pass/fail evaluation

class TPTTestCase:
    """
    TPT organises tests as:
    - Test case: a named scenario (e.g., ABS_Braking_100kph)
    - Steps: signal overrides, wait conditions, assertions
    - Assesslets: reusable pass/fail rules (e.g., SignalInRange)
    - Test set: collection of test cases for regression
    """
    def __init__(self, name):
        self.name  = name
        self.steps = []

    def set_signal(self, signal, value, t_start):
        """Override HIL plant signal at time t_start"""
        self.steps.append(("SET", signal, value, t_start))

    def assert_signal_in_range(self, signal, low, high, t_start, t_end):
        """Assesslet: signal must stay in [low, high] during window"""
        self.steps.append(("ASSERT_RANGE", signal, low, high, t_start, t_end))

    def assert_event_occurs(self, signal, threshold, after_t, before_t):
        """Assesslet: signal must cross threshold between t_start and t_end"""
        self.steps.append(("ASSERT_EVENT", signal, threshold, after_t, before_t))

# Example: ABS activation test case
tc = TPTTestCase("ABS_Braking_100kph")
tc.set_signal("Plant.Vehicle.Speed_kph",    100.0, t_start=0)
tc.set_signal("Plant.Brakes.PedalPct",        0.0, t_start=0)
tc.set_signal("Plant.Brakes.PedalPct",      100.0, t_start=2.0)  # panic brake
tc.assert_event_occurs("ECU.ABS.Active", 0.5, after_t=2.0, before_t=2.5)
tc.assert_signal_in_range("Plant.Wheel.FL.SpeedKph", 0.1, 120.0, 2.0, 7.0)